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흡착제를 이용한 수중의 미량 이취물질 분석법 개발에 관한 연구
김은호,손희종,김영웅,김형석,성낙창,Kim, Eun-Ho,Son, Hee-Jong,Kim, Yeong-Ung,Kim, Hyeong-Seok,Sung, Nak-Chang 한국환경보건학회 1999 한국환경보건학회지 Vol.25 No.3
Even if odorous compounds remain very low concentration in water, it cause strong odor. Because Geosmin and most of odorous compound had very low vaporization, those were difficult to analyze with GC/MSD and Purge & Trap. So, we needed pre-treatment method for decreasing amounts of extracting solvents, improving recovery efficiencies and increasing analytical efficiencies. This study developed efficient technology for analyzing odorous compounds, using various adsorbents and extracting solvents. The optimum adsorbent was XAD resins. Especially, XAD-2, XAD-7 and XAD-2010 were superior, but XAD-2 of these and the optimum extraction solvent is MTBE. Other extraction solvents' efficiency is in order of MTBE>Dichloromethane>n-Hexane>Diethylether. The optimum NaCl dosage for increasing efficiency is 5 g in liquid-liquid extraction method. The shaking time(0~24hr) has no concern with adsorption efficiency. The optimum adsorbent is XAD-2 resin and extraction solvent is MTBE. Dosing NaCl, adsorption efficiency is increased in liquid-liquid extraction method, but NaCl has no effect on liquid-solid extraction method. In this experimental results, this algae toxins(Mycrocystin, Anatoxin etc.).
김은호,김형석,성낙창,허종수 ( Eun Ho Kim,Hyeong Seok Kim,Nak Chang Sung,Jong Soo Heo ) 한국환경농학회 1997 한국환경농학회지 Vol.16 No.2
In this study, we can be obtained the following conclusions about the characteristics of leachate with passed time in the expired landfill. Compared with the expired landfilling H. and S., pH shows a tendency to increase in E., because NH₃ is created by anaerobic degradation and dissolved in leachate. The initial BOD and COD of E. and S. are high in similar concentration but H. is low, Since the organics of waste in H. are lower than in E. and S. during landfilling. SS of E. in concentration is increased and very altered, because food of combustible in E. is higher than it in H. and S.. According to passed time, T-N is high in concentration but T-P shows a similar tendency. Heavy metals of leachate is lower than threshold concentrations. If leachate is treated biologically, microbes are not inibitory.
전술 Ad-hoc 네트워크에서의 효율적인 키 관리 기법
김은호,이수진,Kim, Eun-Ho,Lee, Soo-Jin 한국군사과학기술학회 2009 한국군사과학기술학회지 Vol.12 No.3
Tactical Information Communication Network(TICN) uses both a wireless and wired network. To support mobility in battlefield environments, the application of Ad-hoc networking technology to its wireless communication has been examined. However, Ad-hoc network is faced to many security threats due to its intrinsic characteristics. Therefore, to apply the Ad-hoc networking technology to battlefield environments and TICN, an intensive study on security countermeasure must go side by side with the development of enabling technology. In this paper, we suggest an efficient key management scheme for TICN of which the Ad-hoc networking technology is applied.
헛개나무(Hovenia dulcis Thunberg) 추출물이 활성 산소종과 관련한 효소에 미치는 영향
김은호,이광수,Kim, Eun-Ho,Lee, Kwang-Soo 한국식품영양학회 2012 韓國食品營養學會誌 Vol.25 No.4
In order to investigate the effects of 70% EtOH extract obtained from Hovenia dulcis Thunberg on enzymes relating reactive oxygen intermediate, cancer-stricken animals induced by DEN (N,N-diethylnitrosamine) were recovered by administering the extract of Hovenia dulcis Thunberg. It showed that there was no effect on the generation of superoxide radical by the extract of Hovenia dulcis Thunberg. However, considering the increase of the activity of Cu, Zn-SOD and Mn-SOD in the tested animal class, the extract of Hovenia dulcis Thunberg could participate directly in removing of superoxides. The experimented-animals treated with the extract of Hovenia dulcis Thunberg showed an increase in the activity of the enzymes, catalase and glutathione peroxidase, which can eliminate hydrogen peroxide pertained in liver tissue. The extract of Hovenia dulcis Thunberg seemed to have some factors that accelerate the oxidation. Also, the extract of Hovenia dulcis Thunberg showed effects on the enzymes relating to the active oxygen toxicity which could be an indicator of aging and body toxicity.
슬러리형 돈사분뇨처리를 위한 초임계수 산화공정의 최적 조건
김은호,서정윤,Kim, Ean-Ho,Seo, Jeoung-Yoon 한국환경보건학회 2008 한국환경보건학회지 Vol.34 No.4
In this study, the possibility and the optimal conditions for treating slurry type piggery wastewater using supercritical water oxidation were tested in the laboratory. The results could be summarized as follows; The slurry type piggery wastewater, which was diluted 50 times, was treated most effectively at the pressure of 300 bar, the temperature of $550^{\circ}C$ and the residence time of 10 minutes. The air saturated water was injected, as an oxidizing agent, and the removal efficiencies of $COD_{Cr}$, T-N, $NH_4^+$-N and T-Pattheoptimal conditions were 92, 40, 59 and 100%, respectively. Therefore, analte rnativemea suremu stbetaken to improve theremo valefficiency of the nitrogen compounds.
김은호,손희정,성낙창,허종수,김형석 ( Eun Ho Kim,Hee Jung Son,Nak Chang Sung,Jong Soo Heo,Hyeong Seok Kim ) 한국환경농학회 1997 한국환경농학회지 Vol.16 No.1
This study was carried out to analyze the composition of landfill generation gas using vertical pipe wells installed at landfill. The characteristics of composed waste were examined by the open-cut test at H. landfill in Pusan. The waste compositions of landfill layer by Open-cut test indicated that organic matter was average 4.6∼8.78% in each landfill. CH₄ compositions of gas in each landfill were 49.71∼50.45%(A-point), 50.39∼53.74%(B-point), and 58.76∼61.62%(C-point), respectively. The chemical formula of organic matter left in the underground was C_(36.3)H_(76)O_(30)N_(0.3)S_(0.1) Underground temperatures were changed to 18.8∼25.80℃ when the ambient temperature was about 13.4℃. Temperatures with passed times in A, B and C-lysimeter were about 21.1∼22.5℃, 30∼32.5℃ and 35∼38.5℃, respectively. After about 65 day, decomposition rates of organic matter in A, B and C-lysimeter were 9.9%, 14.9% and 22.3%, respectively.
습식배연탈황공정에서 SO2 흡수에 대한 혼합 유기산 첨가제의 효과
김은호,이재천,이형근,김인원 ( Eun Ho Kim,Jae Chun Lee,Hyung Keun Lee,In Won Kim ) 한국화학공학회 1998 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.36 No.5
In the existing wet flue gas desulfurization processes which have problems of low SO₂ removal efficiency, formation of scale and low limestone utilization, the adding additives to the reactants help enhance SO₂ removal. This is quite attractive since no process changes or large capital expenditure are needed. The organic acid additives enhance the rate if mass transfer. In this work, the properties of additives were studied to improve the reliability and to increase SO₂ removal efficiency. SO₂ absorption into organic solution were modeled by approximate surface removal theory and equilibrium reaction equations and a solution algorithm for numerical solution was developed. Also the criteria of selection of additives were suggested. The mass transfer enhancement by mixed organic acid, which was a byproduct of a company, was tested theoretically as an inexpensive alternative additive.
석회석을 이용한 소화슬러지 탈수성 개선 및 최적조건 결정에 관한 연구
김은호,서정윤,Kim, Ean-Ho,Seo, Jeoung-Yoon 한국환경보건학회 2004 한국환경보건학회지 Vol.30 No.3
The purposes of this study were to examine applicability of limestone as a conditioning agent and to determine the optimum conditions for improving dewaterability of digested sludge. The optimum conditions for temp., pH, dosage, particle size, time, and pressure was $30^{\circ}C$, 7, 45 g/l, 100 mesh, 30 min., and $2.66 {\times} 10^4 N/m^2$, respectively. On the basis of induced optimum conditions, if adding limestone in digested sludge, it estimated that its specific resistance was $1.43 {\times} 1012 m/kg$. Therefore, it seemed that we could utilize limestone as conditioning agent for improving dewaterability of digested sludge.